Continuous Mixture Computational Algorithm of Reservoir Fluid Phase Behavior Applicable for Compositional Reservoir Simulation

Dav910pment of compositional reservoir simulators ia presently hampered due to the complexity of the ●xisting computational algorithm of reservoir fluid phaae behavior calculation. ?hrou~h the application of the theory of polydiaperae fluid mixtures we have been ●ble to develop ● number of algorithms for phase behsvior calculation. In the present report we introduce one of such ●lgorithms. In this ●lgorithm reservoir fluid ia considered to conaint of a continuous mixture with a defined molecular weight/composition distribution . function. Computational computer time required for the new algorithm ia ●hewn to be one order of magnitude smaller than the ●xist’ing algorithms. Aa ●n example, the new algorithm is used to perform retrograde condensation Calculation for two different gas-condernaate reservoir fluids. Compariaona of experimental data with the calculated results i~dicate good agreement between the two.